Interstate Grating Products

Heavy Duty Gratings

Welded Heavy Duty Gratings are designed to service applications subject to heavy rolling and static loads such as highways, plant floors, loading docks, inlet covers and airports. Since these conditions can range from light-duty forklifts to heavy-duty truck or aircraft traffic, heavy duty gratings are manufactured in a wide range of bar sizes and spacings. Our most popular products are described on the following pages.

Heavy Duty Gratings

Vehicular loads are designed in conformance with current AASHTO specifications for classifications H-15 through H-25. Automobile and forklift loads are similarly evaluated with loads calculated and distributed in accordance with the “Maximum Traffic Conditions”. If your application is not adequately addressed by these load conditions, please contact our engineering department and we will gladly assist in the selection of a heavy duty grating to satisfy your specific needs.

Heavy Duty Gratings

Materials & Finishes

Heavy duty gratings are manufactured in carbon steel and 300 series stainless steels. Carbon steel products are available bare (no finish), painted with manufacturers standard paint, or hot dip galvanized. Stainless steel products are available mill finish, commercially cleaned or electro-polished.

Table of Spacings

Banding

Banding

Heavy duty gratings are commonly subjected to shock and impact loads and it is highly recommended that all open ends be banded. The welded band bar helps distribute impact loads and minimizes distortion when subjected to repetitive traffic patterns. Banding details can be found under Banding/Layout/Fasteners.


Serrated Surface

Serrated Surface

Optional serrated bearing bars enhance skid resistance. Consider this surface for applications subject to the accumulation of liquids or lubricants or inclined grating installations.


How to Specify Heavy Duty Bar Grating

  1. Select type of grating
    • “W” for Welded Steel Grating
    • “WS” for Welded Stainless Steel Grating
  2. Select bar spacing from table above
  3. Select bearing bar size from Load Tables
  4. Specify Plain or Serrated surface
  5. Specify banding and any additional trim required
  6. Specify finish
    • Bare steel (no finish)
    • Painted (red, black, silver, other)
    • Hot Dip Galvanized (per ASTM A-123)
    • Other
  7. Specify fasteners
    (if required) - Banding / Layout / Fasteners

Heavy Duty Bar